银纳米线涂层的编链结构纱线拉伸应变传感器

Strain sensor based on silver nanowires coated yarn with chain stitch structure

为制备柔性纱线拉伸应变传感器,将蚕丝加捻得到的蚕丝纱编织为闭口编链组织结构;通过多元醇还原硝酸银的方法制备银纳米线,在银纳米线的乙醇分散液中通过浸渍方法对基底纱线进行导电修饰,最终得到银纳米线涂层的编链组织拉伸应变传感器,研究了该组织结构拉伸应变传感器的应变-电阻传感性能。结果表明:编链组织结构的传感器具有显著的拉伸应变传感性能,该纱线传感器的电阻随着应变量的增加而减小;在拉伸应变小于5%的范围内,拉伸应变系数高达20. 14;传感器在0. 01~1. 00 Hz的拉伸频率范围内有稳定的响应,且传感器具有很好的循环稳定性。

In order to prepare yarn-based strain sensor,the twisted silk filaments were woven into a closed chain stitch structure. Silver nanowire was prepared by reducing silver nitrate with polyol,base yarns were impregnated in an ethanol dispersion of the silver nanowires for conductivity modification. The strain-resistance sensing performance of the yarn-based strain sensor was studied. The results show that the yarns with the chain stitch structure have excellent strain sensing performance,the yarn resistance decreases with the increase of the strain. When the tensile strain is less than 5%,the gauge factor of the strain sensor is up to 20. 14. The sensor has stable response in the tensile frequency range from 0. 01 Hz to 1. 00 Hz,and also has good cycle stability.